A slew drive is a gearbox designed to handle radial or axial loads using high rotational torque. In addition, the slewing ring bearing, at the heart of the drive, enables it to withstand high overhung or moment loads. A descendent of the “worm” screw, slewing drives are present in construction machinery, manufacturing, military equipment and many other applications that require strength and precision.

The physics of the slew drive makes it a versatile solution for many applications. In operation, the slew drive’s axial movement, or motion around its axis, interacts to create radial torque. The action occurs by meshing the grooves of the horizontal screw with the teeth of a perpendicular gear. While turning, the worm gear’s axial movement transfers magnified torque force to the radial gear. The number of threads on the horizontal screw and the number of gears that interact will determine the speed ratio of the setup.Types Slewing drives are available in many configurations depending on the task at hand. These may be single axis or dual axis turning in unison.

An hourglass configuration expands the capability from a single gear tooth to as many as eleven to create rotational torque by contacting the worm screw. Multiple gear teeth interacting at once allows the equipment to be more efficient and generate more torque.

Functions

Slew drives work best for applications in which high torque can create precision positioning and rotational accuracy. This design results in a device which works smoothly and powerfully with minimal backlash.

Because of the power and dependability generated by slew drive technology, the functions of this engineering technology apply to many types of equipment. One particular use, for example, involves solar technology, tracking the sun’s movements in perfect time to generate maximum energy output.

Any job requiring high load capacity and reliable positioning may require the implementation of slewing drive engineering.

Features

Robust, smooth, and consistent, slew drives have a distinct place in manufacturing, construction, and many other venues. Based on a centuries-old engineering idea, slew drive-operated equipment can be simple or complex, depending upon the requirements.

Adding hydraulic, pneumatic, or electric motors to single, double, or hourglass design depends on the application. Other features such as brakes or self-locking features and open or closed chassis are among many options.

Applications of Slewing Drives

The list of active applications for slew drives is extensive. Several types of industries require some form of slew drive to make their operations more efficient. Equipment for mining, construction, metal working, and other applications that require unrelenting strength combined with faultless precision use slewing technology for safety and accuracy.